source/dsdb/samdb/cracknames.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    endpoint server for the drsuapi pipe
   5    DsCrackNames()
   6
   7    Copyright (C) Stefan Metzmacher 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "librpc/gen_ndr/ndr_drsuapi.h"
  27 #include "rpc_server/common/common.h"
  28 #include "lib/ldb/include/ldb_errors.h"
  29 #include "system/kerberos.h"
  30 #include "auth/kerberos/kerberos.h"
  31 #include "dsdb/samdb/samdb.h"
  32 #include "libcli/ldap/ldap.h"
  33 #include "auth/auth.h"
  34
  35 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
  36                                    struct smb_krb5_context *smb_krb5_context,
  37                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
  38                                    const struct ldb_dn *name_dn, const char *name,
  39                                    const char *domain_filter, const char *result_filter,
  40                                    struct drsuapi_DsNameInfo1 *info1);
  41 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
  42                                         uint32_t format_offered, uint32_t format_desired,
  43                                         const struct ldb_dn *name_dn, const char *name,
  44                                         struct drsuapi_DsNameInfo1 *info1);
  45
  46 static enum drsuapi_DsNameStatus LDB_lookup_spn_alias(krb5_context context, struct ldb_context *ldb_ctx,
  47                                                       TALLOC_CTX *mem_ctx,
  48                                                       const char *alias_from,
  49                                                       char **alias_to)
  50 {
  51         int i;
  52         int ret;
  53         struct ldb_result *res;
  54         struct ldb_message_element *spnmappings;
  55         TALLOC_CTX *tmp_ctx;
  56         struct ldb_dn *service_dn;
  57         char *service_dn_str;
  58
  59         const char *directory_attrs[] = {
  60                 "sPNMappings",
  61                 NULL
  62         };
  63
  64         tmp_ctx = talloc_new(mem_ctx);
  65         if (!tmp_ctx) {
  66                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  67         }
  68
  69         service_dn = ldb_dn_string_compose(tmp_ctx, samdb_base_dn(mem_ctx),
  70                                                 "CN=Directory Service,CN=Windows NT"
  71                                                 ",CN=Services,CN=Configuration");
  72         service_dn_str = ldb_dn_linearize(tmp_ctx, service_dn);
  73
  74         ret = ldb_search(ldb_ctx, service_dn, LDB_SCOPE_BASE, "(objectClass=nTDSService)",
  75                          directory_attrs, &res);
  76
  77         if (ret != LDB_SUCCESS) {
  78                 DEBUG(1, ("ldb_search: dn: %s not found: %s", service_dn_str, ldb_errstring(ldb_ctx)));
  79                 return DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
  80         } else if (res->count > 1) {
  81                 talloc_free(res);
  82                 DEBUG(1, ("ldb_search: dn: %s found %d times!", service_dn_str, res->count));
  83                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  84         }
  85         talloc_steal(tmp_ctx, res);
  86
  87         spnmappings = ldb_msg_find_element(res->msgs[0], "sPNMappings");
  88         if (!spnmappings || spnmappings->num_values == 0) {
  89                 DEBUG(1, ("ldb_search: dn: %s no sPNMappings attribute", service_dn_str));
  90                 talloc_free(tmp_ctx);
  91                 return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
  92         }
  93
  94         for (i = 0; i < spnmappings->num_values; i++) {
  95                 char *mapping, *p, *str;
  96                 mapping = talloc_strdup(tmp_ctx,
  97                                         (const char *)spnmappings->values[i].data);
  98                 if (!mapping) {
  99                         DEBUG(1, ("LDB_lookup_spn_alias: ldb_search: dn: %s did not have an sPNMapping\n", service_dn_str));
 100                         talloc_free(tmp_ctx);
 101                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 102                 }
 103
 104                 /* C string manipulation sucks */
 105
 106                 p = strchr(mapping, '=');
 107                 if (!p) {
 108                         DEBUG(1, ("ldb_search: dn: %s sPNMapping malformed: %s\n",
 109                                   service_dn_str, mapping));
 110                         talloc_free(tmp_ctx);
 111                         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 112                 }
 113                 p[0] = '\0';
 114                 p++;
 115                 do {
 116                         str = p;
 117                         p = strchr(p, ',');
 118                         if (p) {
 119                                 p[0] = '\0';
 120                                 p++;
 121                         }
 122                         if (strcasecmp(str, alias_from) == 0) {
 123                                 *alias_to = mapping;
 124                                 talloc_steal(mem_ctx, mapping);
 125                                 talloc_free(tmp_ctx);
 126                                 return DRSUAPI_DS_NAME_STATUS_OK;
 127                         }
 128                 } while (p);
 129         }
 130         DEBUG(1, ("LDB_lookup_spn_alias: no alias for service %s applicable\n", alias_from));
 131         talloc_free(tmp_ctx);
 132         return DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 133 }
 134
 135 /* When cracking a ServicePrincipalName, many services may be served
 136  * by the host/ servicePrincipalName.  The incoming query is for cifs/
 137  * but we translate it here, and search on host/.  This is done after
 138  * the cifs/ entry has been searched for, making this a fallback */
 139
 140 static WERROR DsCrackNameSPNAlias(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 141                                   struct smb_krb5_context *smb_krb5_context,
 142                                   uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 143                                   const char *name, struct drsuapi_DsNameInfo1 *info1)
 144 {
 145         WERROR wret;
 146         krb5_error_code ret;
 147         krb5_principal principal;
 148         const char *service;
 149         char *new_service;
 150         char *new_princ;
 151         enum drsuapi_DsNameStatus namestatus;
 152
 153         /* parse principal */
 154         ret = krb5_parse_name_norealm(smb_krb5_context->krb5_context,
 155                                       name, &principal);
 156         if (ret) {
 157                 DEBUG(2, ("Could not parse principal: %s: %s",
 158                           name, smb_get_krb5_error_message(smb_krb5_context->krb5_context,
 159                                                            ret, mem_ctx)));
 160                 return WERR_NOMEM;
 161         }
 162
 163         /* grab cifs/, http/ etc */
 164
 165         /* This is checked for in callers, but be safe */
 166         if (principal->name.name_string.len < 2) {
 167                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 168                 return WERR_OK;
 169         }
 170         service = principal->name.name_string.val[0];
 171
 172         /* MAP it */
 173         namestatus = LDB_lookup_spn_alias(smb_krb5_context->krb5_context,
 174                                           sam_ctx, mem_ctx,
 175                                           service, &new_service);
 176
 177         if (namestatus != DRSUAPI_DS_NAME_STATUS_OK) {
 178                 info1->status = namestatus;
 179                 return WERR_OK;
 180         }
 181
 182         if (ret != 0) {
 183                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 184                 return WERR_OK;
 185         }
 186
 187         /* ooh, very nasty playing around in the Principal... */
 188         free(principal->name.name_string.val[0]);
 189         principal->name.name_string.val[0] = strdup(new_service);
 190         if (!principal->name.name_string.val[0]) {
 191                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 192                 return WERR_NOMEM;
 193         }
 194
 195         /* reform principal */
 196         ret = krb5_unparse_name_norealm(smb_krb5_context->krb5_context, principal, &new_princ);
 197
 198         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 199
 200         if (ret) {
 201                 return WERR_NOMEM;
 202         }
 203
 204         wret = DsCrackNameOneName(sam_ctx, mem_ctx, format_flags, format_offered, format_desired,
 205                                   new_princ, info1);
 206         free(new_princ);
 207         return wret;
 208 }
 209
 210 /* Subcase of CrackNames, for the userPrincipalName */
 211
 212 static WERROR DsCrackNameUPN(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 213                              struct smb_krb5_context *smb_krb5_context,
 214                              uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 215                              const char *name, struct drsuapi_DsNameInfo1 *info1)
 216 {
 217         WERROR status;
 218         const char *domain_filter = NULL;
 219         const char *result_filter = NULL;
 220         krb5_error_code ret;
 221         krb5_principal principal;
 222         char **realm;
 223         char *unparsed_name_short;
 224
 225         /* Prevent recursion */
 226         if (!name) {
 227                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 228                 return WERR_OK;
 229         }
 230
 231         ret = krb5_parse_name_mustrealm(smb_krb5_context->krb5_context, name, &principal);
 232         if (ret) {
 233                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 234                 return WERR_OK;
 235         }
 236
 237         domain_filter = NULL;
 238         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 239         domain_filter = talloc_asprintf(mem_ctx,
 240                                         "(&(&(|(&(dnsRoot=%s)(nETBIOSName=*))(nETBIOSName=%s))(objectclass=crossRef))(ncName=*))",
 241                                         ldb_binary_encode_string(mem_ctx, *realm),
 242                                         ldb_binary_encode_string(mem_ctx, *realm));
 243         ret = krb5_unparse_name_norealm(smb_krb5_context->krb5_context, principal, &unparsed_name_short);
 244         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 245
 246         if (ret) {
 247                 free(unparsed_name_short);
 248                 return WERR_NOMEM;
 249         }
 250
 251         /* This may need to be extended for more userPrincipalName variations */
 252         result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(samAccountName=%s))",
 253                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 254         if (!result_filter || !domain_filter) {
 255                 free(unparsed_name_short);
 256                 return WERR_NOMEM;
 257         }
 258         status = DsCrackNameOneFilter(sam_ctx, mem_ctx,
 259                                       smb_krb5_context,
 260                                       format_flags, format_offered, format_desired,
 261                                       NULL, unparsed_name_short, domain_filter, result_filter,
 262                                       info1);
 263         free(unparsed_name_short);
 264         return status;
 265 }
 266
 267 /* Crack a single 'name', from format_offered into format_desired, returning the result in info1 */
 268
 269 WERROR DsCrackNameOneName(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 270                           uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 271                           const char *name, struct drsuapi_DsNameInfo1 *info1)
 272 {
 273         krb5_error_code ret;
 274         const char *domain_filter = NULL;
 275         const char *result_filter = NULL;
 276         struct ldb_dn *name_dn = NULL;
 277
 278         struct smb_krb5_context *smb_krb5_context;
 279         ret = smb_krb5_init_context(mem_ctx, &smb_krb5_context);
 280
 281         if (ret) {
 282                 return WERR_NOMEM;
 283         }
 284
 285         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 286         info1->dns_domain_name = NULL;
 287         info1->result_name = NULL;
 288
 289         if (!name) {
 290                 return WERR_INVALID_PARAM;
 291         }
 292
 293         /* TODO: - fill the correct names in all cases!
 294          *       - handle format_flags
 295          */
 296
 297         /* here we need to set the domain_filter and/or the result_filter */
 298         switch (format_offered) {
 299         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 300                 char *str;
 301
 302                 str = talloc_strdup(mem_ctx, name);
 303                 WERR_TALLOC_CHECK(str);
 304
 305                 if (strlen(str) == 0 || str[strlen(str)-1] != '/') {
 306                         info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 307                         return WERR_OK;
 308                 }
 309
 310                 str[strlen(str)-1] = '\0';
 311
 312                 domain_filter = talloc_asprintf(mem_ctx,
 313                                                 "(&(&(&(dnsRoot=%s)(objectclass=crossRef)))(nETBIOSName=*)(ncName=*))",
 314                                                 ldb_binary_encode_string(mem_ctx, str));
 315                 WERR_TALLOC_CHECK(domain_filter);
 316
 317                 break;
 318         }
 319         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 320                 char *p;
 321                 char *domain;
 322                 const char *account = NULL;
 323
 324                 domain = talloc_strdup(mem_ctx, name);
 325                 WERR_TALLOC_CHECK(domain);
 326
 327                 p = strchr(domain, '\\');
 328                 if (!p) {
 329                         /* invalid input format */
 330                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 331                         return WERR_OK;
 332                 }
 333                 p[0] = '\0';
 334
 335                 if (p[1]) {
 336                         account = &p[1];
 337                 }
 338
 339                 domain_filter = talloc_asprintf(mem_ctx,
 340                                                 "(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
 341                                                 ldb_binary_encode_string(mem_ctx, domain));
 342                 WERR_TALLOC_CHECK(domain_filter);
 343                 if (account) {
 344                         result_filter = talloc_asprintf(mem_ctx, "(sAMAccountName=%s)",
 345                                                         ldb_binary_encode_string(mem_ctx, account));
 346                         WERR_TALLOC_CHECK(result_filter);
 347                 }
 348
 349                 talloc_free(domain);
 350                 break;
 351         }
 352
 353                 /* A LDAP DN as a string */
 354         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 355                 name_dn = ldb_dn_explode(mem_ctx, name);
 356                 domain_filter = NULL;
 357                 if (!name_dn) {
 358                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 359                         return WERR_OK;
 360                 }
 361                 break;
 362         }
 363
 364                 /* A GUID as a string */
 365         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 366                 struct GUID guid;
 367                 char *ldap_guid;
 368                 NTSTATUS nt_status;
 369                 domain_filter = NULL;
 370
 371                 nt_status = GUID_from_string(name, &guid);
 372                 if (!NT_STATUS_IS_OK(nt_status)) {
 373                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 374                         return WERR_OK;
 375                 }
 376
 377                 ldap_guid = ldap_encode_ndr_GUID(mem_ctx, &guid);
 378                 if (!ldap_guid) {
 379                         return WERR_NOMEM;
 380                 }
 381                 result_filter = talloc_asprintf(mem_ctx, "(objectGUID=%s)",
 382                                                 ldap_guid);
 383                 WERR_TALLOC_CHECK(result_filter);
 384                 break;
 385         }
 386         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 387                 domain_filter = NULL;
 388
 389                 result_filter = talloc_asprintf(mem_ctx, "(|(displayName=%s)(samAccountName=%s))",
 390                                                 ldb_binary_encode_string(mem_ctx, name),
 391                                                 ldb_binary_encode_string(mem_ctx, name));
 392                 WERR_TALLOC_CHECK(result_filter);
 393                 break;
 394         }
 395
 396                 /* A S-1234-5678 style string */
 397         case DRSUAPI_DS_NAME_FORMAT_SID_OR_SID_HISTORY: {
 398                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, name);
 399                 char *ldap_sid;
 400
 401                 domain_filter = NULL;
 402                 if (!sid) {
 403                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 404                         return WERR_OK;
 405                 }
 406                 ldap_sid = ldap_encode_ndr_dom_sid(mem_ctx,
 407                                                    sid);
 408                 if (!ldap_sid) {
 409                         return WERR_NOMEM;
 410                 }
 411                 result_filter = talloc_asprintf(mem_ctx, "(objectSid=%s)",
 412                                                 ldap_sid);
 413                 WERR_TALLOC_CHECK(result_filter);
 414                 break;
 415         }
 416         case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL: {
 417                 krb5_principal principal;
 418                 char *unparsed_name;
 419                 ret = krb5_parse_name(smb_krb5_context->krb5_context, name, &principal);
 420                 if (ret) {
 421                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 422                         return WERR_OK;
 423                 }
 424
 425                 domain_filter = NULL;
 426
 427                 ret = krb5_unparse_name(smb_krb5_context->krb5_context, principal, &unparsed_name);
 428                 if (ret) {
 429                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 430                         return WERR_NOMEM;
 431                 }
 432
 433                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 434                 result_filter = talloc_asprintf(mem_ctx, "(&(objectClass=user)(userPrincipalName=%s))",
 435                                                 ldb_binary_encode_string(mem_ctx, unparsed_name));
 436
 437                 free(unparsed_name);
 438                 WERR_TALLOC_CHECK(result_filter);
 439                 break;
 440         }
 441         case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL: {
 442                 krb5_principal principal;
 443                 char *unparsed_name_short;
 444                 char *service;
 445                 ret = krb5_parse_name_norealm(smb_krb5_context->krb5_context, name, &principal);
 446                 if (ret) {
 447                         /* perhaps it's a principal with a realm, so return the right 'domain only' response */
 448                         char **realm;
 449                         ret = krb5_parse_name_mustrealm(smb_krb5_context->krb5_context, name, &principal);
 450                         if (ret) {
 451                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 452                                 return WERR_OK;
 453                         }
 454
 455                         /* This isn't an allocation assignemnt, so it is free'ed with the krb5_free_principal */
 456                         realm = krb5_princ_realm(smb_krb5_context->krb5_context, principal);
 457
 458                         info1->dns_domain_name  = talloc_strdup(info1, *realm);
 459                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 460
 461                         WERR_TALLOC_CHECK(info1->dns_domain_name);
 462
 463                         info1->status = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 464                         return WERR_OK;
 465
 466                 } else if (principal->name.name_string.len < 2) {
 467                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 468                         return WERR_OK;
 469                 }
 470
 471                 domain_filter = NULL;
 472
 473                 ret = krb5_unparse_name_norealm(smb_krb5_context->krb5_context, principal, &unparsed_name_short);
 474                 if (ret) {
 475                         krb5_free_principal(smb_krb5_context->krb5_context, principal);
 476                         return WERR_NOMEM;
 477                 }
 478
 479                 service = principal->name.name_string.val[0];
 480                 if ((principal->name.name_string.len == 2) && (strcasecmp(service, "host") == 0)) {
 481                         /* the 'cn' attribute is just the leading part of the name */
 482                         char *computer_name;
 483                         computer_name = talloc_strndup(mem_ctx, principal->name.name_string.val[1],
 484                                                       strcspn(principal->name.name_string.val[1], "."));
 485                         if (computer_name == NULL) {
 486                                 return WERR_NOMEM;
 487                         }
 488
 489                         result_filter = talloc_asprintf(mem_ctx, "(|(&(servicePrincipalName=%s)(objectClass=user))(&(cn=%s)(objectClass=computer)))",
 490                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short),
 491                                                         ldb_binary_encode_string(mem_ctx, computer_name));
 492                 } else {
 493                         result_filter = talloc_asprintf(mem_ctx, "(&(servicePrincipalName=%s)(objectClass=user))",
 494                                                         ldb_binary_encode_string(mem_ctx, unparsed_name_short));
 495                 }
 496                 krb5_free_principal(smb_krb5_context->krb5_context, principal);
 497                 free(unparsed_name_short);
 498                 WERR_TALLOC_CHECK(result_filter);
 499
 500                 break;
 501         }
 502         default: {
 503                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 504                 return WERR_OK;
 505         }
 506
 507         }
 508
 509         if (format_flags & DRSUAPI_DS_NAME_FLAG_SYNTACTICAL_ONLY) {
 510                 return DsCrackNameOneSyntactical(mem_ctx, format_offered, format_desired,
 511                                                  name_dn, name, info1);
 512         }
 513
 514         return DsCrackNameOneFilter(sam_ctx, mem_ctx,
 515                                     smb_krb5_context,
 516                                     format_flags, format_offered, format_desired,
 517                                     name_dn, name,
 518                                     domain_filter, result_filter,
 519                                     info1);
 520 }
 521
 522 /* Subcase of CrackNames.  It is possible to translate a LDAP-style DN
 523  * (FQDN_1779) into a canoical name without actually searching the
 524  * database */
 525
 526 static WERROR DsCrackNameOneSyntactical(TALLOC_CTX *mem_ctx,
 527                                         uint32_t format_offered, uint32_t format_desired,
 528                                         const struct ldb_dn *name_dn, const char *name,
 529                                         struct drsuapi_DsNameInfo1 *info1)
 530 {
 531         char *cracked;
 532         if (format_offered != DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 533                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 534                 return WERR_OK;
 535         }
 536
 537         switch (format_desired) {
 538         case DRSUAPI_DS_NAME_FORMAT_CANONICAL:
 539                 cracked = ldb_dn_canonical_string(mem_ctx, name_dn);
 540                 break;
 541         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX:
 542                 cracked = ldb_dn_canonical_ex_string(mem_ctx, name_dn);
 543                 break;
 544         default:
 545                 info1->status = DRSUAPI_DS_NAME_STATUS_NO_SYNTACTICAL_MAPPING;
 546                 return WERR_OK;
 547         }
 548         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 549         info1->result_name      = cracked;
 550         if (!cracked) {
 551                 return WERR_NOMEM;
 552         }
 553
 554         return WERR_OK;
 555 }
 556
 557 /* Given a filter for the domain, and one for the result, perform the
 558  * ldb search. The format offered and desired flags change the
 559  * behaviours, including what attributes to return.
 560  *
 561  * The smb_krb5_context is required because we use the krb5 libs for principal parsing
 562  */
 563
 564 static WERROR DsCrackNameOneFilter(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 565                                    struct smb_krb5_context *smb_krb5_context,
 566                                    uint32_t format_flags, uint32_t format_offered, uint32_t format_desired,
 567                                    const struct ldb_dn *name_dn, const char *name,
 568                                    const char *domain_filter, const char *result_filter,
 569                                    struct drsuapi_DsNameInfo1 *info1)
 570 {
 571         int ldb_ret;
 572         struct ldb_message **domain_res = NULL;
 573         const char * const *domain_attrs;
 574         const char * const *result_attrs;
 575         struct ldb_message **result_res = NULL;
 576         const struct ldb_dn *result_basedn;
 577
 578         /* here we need to set the attrs lists for domain and result lookups */
 579         switch (format_desired) {
 580         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779:
 581         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 582                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", NULL};
 583                 const char * const _result_attrs[] = { NULL};
 584
 585                 domain_attrs = _domain_attrs;
 586                 result_attrs = _result_attrs;
 587                 break;
 588         }
 589         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 590                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", NULL};
 591                 const char * const _result_attrs[] = { "canonicalName", NULL };
 592
 593                 domain_attrs = _domain_attrs;
 594                 result_attrs = _result_attrs;
 595                 break;
 596         }
 597         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 598                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", "nETBIOSName", NULL};
 599                 const char * const _result_attrs[] = { "sAMAccountName", "objectSid", NULL};
 600
 601                 domain_attrs = _domain_attrs;
 602                 result_attrs = _result_attrs;
 603                 break;
 604         }
 605         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 606                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", NULL};
 607                 const char * const _result_attrs[] = { "objectGUID", NULL};
 608
 609                 domain_attrs = _domain_attrs;
 610                 result_attrs = _result_attrs;
 611                 break;
 612         }
 613         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 614                 const char * const _domain_attrs[] = { "ncName", "dnsRoot", NULL};
 615                 const char * const _result_attrs[] = { "displayName", "samAccountName", NULL};
 616
 617                 domain_attrs = _domain_attrs;
 618                 result_attrs = _result_attrs;
 619                 break;
 620         }
 621         default:
 622                 return WERR_OK;
 623         }
 624
 625         if (domain_filter) {
 626                 /* if we have a domain_filter look it up and set the result_basedn and the dns_domain_name */
 627                 ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, domain_attrs,
 628                                        "%s", domain_filter);
 629         } else {
 630                 ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, domain_attrs,
 631                                        "(ncName=%s)", ldb_dn_linearize(mem_ctx, samdb_base_dn(mem_ctx)));
 632         }
 633
 634         switch (ldb_ret) {
 635         case 1:
 636                 break;
 637         case 0:
 638                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 639                 return WERR_OK;
 640         case -1:
 641                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 642                 return WERR_OK;
 643         default:
 644                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 645                 return WERR_OK;
 646         }
 647
 648         info1->dns_domain_name  = samdb_result_string(domain_res[0], "dnsRoot", NULL);
 649         WERR_TALLOC_CHECK(info1->dns_domain_name);
 650         info1->status           = DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY;
 651
 652         if (result_filter) {
 653                 result_basedn = samdb_result_dn(mem_ctx, domain_res[0], "ncName", NULL);
 654
 655                 ldb_ret = gendb_search(sam_ctx, mem_ctx, result_basedn, &result_res,
 656                                        result_attrs, "%s", result_filter);
 657         } else if (format_offered == DRSUAPI_DS_NAME_FORMAT_FQDN_1779) {
 658                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 659                                           result_attrs);
 660         } else {
 661                 name_dn = samdb_result_dn(mem_ctx, domain_res[0], "ncName", NULL);
 662                 ldb_ret = gendb_search_dn(sam_ctx, mem_ctx, name_dn, &result_res,
 663                                           result_attrs);
 664         }
 665
 666         switch (ldb_ret) {
 667         case 1:
 668                 break;
 669         case 0:
 670                 switch (format_offered) {
 671                 case DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL:
 672                         return DsCrackNameSPNAlias(sam_ctx, mem_ctx,
 673                                                    smb_krb5_context,
 674                                                    format_flags, format_offered, format_desired,
 675                                                    name, info1);
 676
 677                 case DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL:
 678                         return DsCrackNameUPN(sam_ctx, mem_ctx, smb_krb5_context,
 679                                               format_flags, format_offered, format_desired,
 680                                               name, info1);
 681                 }
 682                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 683                 return WERR_OK;
 684         case -1:
 685                 info1->status = DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR;
 686                 return WERR_OK;
 687         default:
 688                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE;
 689                 return WERR_OK;
 690         }
 691
 692         /* here we can use result_res[0] and domain_res[0] */
 693         switch (format_desired) {
 694         case DRSUAPI_DS_NAME_FORMAT_FQDN_1779: {
 695                 info1->result_name      = ldb_dn_linearize(mem_ctx, result_res[0]->dn);
 696                 WERR_TALLOC_CHECK(info1->result_name);
 697
 698                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 699                 return WERR_OK;
 700         }
 701         case DRSUAPI_DS_NAME_FORMAT_CANONICAL: {
 702                 info1->result_name      = samdb_result_string(result_res[0], "canonicalName", NULL);
 703                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 704                 return WERR_OK;
 705         }
 706         case DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX: {
 707                 /* Not in the virtual ldb attribute */
 708                 return DsCrackNameOneSyntactical(mem_ctx,
 709                                                  DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 710                                                  DRSUAPI_DS_NAME_FORMAT_CANONICAL_EX,
 711                                                  result_res[0]->dn, name, info1);
 712         }
 713         case DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT: {
 714                 const struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, result_res[0], "objectSid");
 715                 const char *_acc = "", *_dom = "";
 716
 717                 if (!sid || (sid->num_auths < 4) || (sid->num_auths > 5)) {
 718                         info1->status = DRSUAPI_DS_NAME_STATUS_NO_MAPPING;
 719                         return WERR_OK;
 720                 }
 721
 722                 if (sid->num_auths == 4) {
 723                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, domain_attrs,
 724                                                "(ncName=%s)", ldb_dn_linearize(mem_ctx, result_res[0]->dn));
 725                         if (ldb_ret != 1) {
 726                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 727                                 return WERR_OK;
 728                         }
 729                         _dom = samdb_result_string(domain_res[0], "nETBIOSName", NULL);
 730                         WERR_TALLOC_CHECK(_dom);
 731
 732                 } else if (sid->num_auths == 5) {
 733                         const char *attrs[] = { NULL };
 734                         struct ldb_message **domain_res2;
 735                         struct dom_sid *dom_sid = dom_sid_dup(mem_ctx, sid);
 736                         if (!dom_sid) {
 737                                 return WERR_OK;
 738                         }
 739                         dom_sid->num_auths--;
 740                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res, attrs,
 741                                                "(&(objectSid=%s)(objectClass=domain))", ldap_encode_ndr_dom_sid(mem_ctx, dom_sid));
 742                         if (ldb_ret != 1) {
 743                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 744                                 return WERR_OK;
 745                         }
 746                         ldb_ret = gendb_search(sam_ctx, mem_ctx, NULL, &domain_res2, domain_attrs,
 747                                                "(ncName=%s)", ldb_dn_linearize(mem_ctx, domain_res[0]->dn));
 748                         if (ldb_ret != 1) {
 749                                 info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 750                                 return WERR_OK;
 751                         }
 752
 753                         _dom = samdb_result_string(domain_res2[0], "nETBIOSName", NULL);
 754                         WERR_TALLOC_CHECK(_dom);
 755
 756                         _acc = samdb_result_string(result_res[0], "sAMAccountName", NULL);
 757                         WERR_TALLOC_CHECK(_acc);
 758                 }
 759
 760                 info1->result_name      = talloc_asprintf(mem_ctx, "%s\\%s", _dom, _acc);
 761                 WERR_TALLOC_CHECK(info1->result_name);
 762
 763                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 764                 return WERR_OK;
 765         }
 766         case DRSUAPI_DS_NAME_FORMAT_GUID: {
 767                 struct GUID guid;
 768
 769                 guid = samdb_result_guid(result_res[0], "objectGUID");
 770
 771                 info1->result_name      = GUID_string2(mem_ctx, &guid);
 772                 WERR_TALLOC_CHECK(info1->result_name);
 773
 774                 info1->status           = DRSUAPI_DS_NAME_STATUS_OK;
 775                 return WERR_OK;
 776         }
 777         case DRSUAPI_DS_NAME_FORMAT_DISPLAY: {
 778                 info1->result_name      = samdb_result_string(result_res[0], "displayName", NULL);
 779                 if (!info1->result_name) {
 780                         info1->result_name      = samdb_result_string(result_res[0], "sAMAccountName", NULL);
 781                 }
 782                 if (!info1->result_name) {
 783                         info1->status = DRSUAPI_DS_NAME_STATUS_NOT_FOUND;
 784                 } else {
 785                         info1->status = DRSUAPI_DS_NAME_STATUS_OK;
 786                 }
 787                 return WERR_OK;
 788         }
 789         default:
 790                 return WERR_OK;
 791         }
 792
 793         return WERR_INVALID_PARAM;
 794 }
 795
 796 /* Given a user Principal Name (such as foo@bar.com),
 797  * return the user and domain DNs.  This is used in the KDC to then
 798  * return the Keys and evaluate policy */
 799
 800 NTSTATUS crack_user_principal_name(struct ldb_context *sam_ctx,
 801                                    TALLOC_CTX *mem_ctx,
 802                                    const char *user_principal_name,
 803                                    struct ldb_dn **user_dn,
 804                                    struct ldb_dn **domain_dn)
 805 {
 806         WERROR werr;
 807         struct drsuapi_DsNameInfo1 info1;
 808         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 809                                   DRSUAPI_DS_NAME_FORMAT_USER_PRINCIPAL,
 810                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 811                                   user_principal_name,
 812                                   &info1);
 813         if (!W_ERROR_IS_OK(werr)) {
 814                 return werror_to_ntstatus(werr);
 815         }
 816         switch (info1.status) {
 817         case DRSUAPI_DS_NAME_STATUS_OK:
 818                 break;
 819         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 820         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 821         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 822                 return NT_STATUS_NO_SUCH_USER;
 823         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 824         default:
 825                 return NT_STATUS_UNSUCCESSFUL;
 826         }
 827
 828         *user_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 829
 830         if (domain_dn) {
 831                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 832                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 833                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 834                                           talloc_asprintf(mem_ctx, "%s/",
 835                                                           info1.dns_domain_name),
 836                                           &info1);
 837                 if (!W_ERROR_IS_OK(werr)) {
 838                         return werror_to_ntstatus(werr);
 839                 }
 840                 switch (info1.status) {
 841                 case DRSUAPI_DS_NAME_STATUS_OK:
 842                         break;
 843                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 844                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 845                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 846                         return NT_STATUS_NO_SUCH_USER;
 847                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 848                 default:
 849                         return NT_STATUS_UNSUCCESSFUL;
 850                 }
 851
 852                 *domain_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 853         }
 854
 855         return NT_STATUS_OK;
 856
 857 }
 858
 859 /* Given a Service Principal Name (such as host/foo.bar.com@BAR.COM),
 860  * return the user and domain DNs.  This is used in the KDC to then
 861  * return the Keys and evaluate policy */
 862
 863 NTSTATUS crack_service_principal_name(struct ldb_context *sam_ctx,
 864                                       TALLOC_CTX *mem_ctx,
 865                                       const char *service_principal_name,
 866                                       struct ldb_dn **user_dn,
 867                                       struct ldb_dn **domain_dn)
 868 {
 869         WERROR werr;
 870         struct drsuapi_DsNameInfo1 info1;
 871         werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 872                                   DRSUAPI_DS_NAME_FORMAT_SERVICE_PRINCIPAL,
 873                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 874                                   service_principal_name,
 875                                   &info1);
 876         if (!W_ERROR_IS_OK(werr)) {
 877                 return werror_to_ntstatus(werr);
 878         }
 879         switch (info1.status) {
 880         case DRSUAPI_DS_NAME_STATUS_OK:
 881                 break;
 882         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 883         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 884         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 885                 return NT_STATUS_NO_SUCH_USER;
 886         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 887         default:
 888                 return NT_STATUS_UNSUCCESSFUL;
 889         }
 890
 891         *user_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 892
 893         if (domain_dn) {
 894                 werr = DsCrackNameOneName(sam_ctx, mem_ctx, 0,
 895                                           DRSUAPI_DS_NAME_FORMAT_CANONICAL,
 896                                           DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 897                                           talloc_asprintf(mem_ctx, "%s/",
 898                                                           info1.dns_domain_name),
 899                                           &info1);
 900                 if (!W_ERROR_IS_OK(werr)) {
 901                         return werror_to_ntstatus(werr);
 902                 }
 903                 switch (info1.status) {
 904                 case DRSUAPI_DS_NAME_STATUS_OK:
 905                         break;
 906                 case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 907                 case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 908                 case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 909                         return NT_STATUS_NO_SUCH_USER;
 910                 case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 911                 default:
 912                         return NT_STATUS_UNSUCCESSFUL;
 913                 }
 914
 915                 *domain_dn = ldb_dn_explode(mem_ctx, info1.result_name);
 916         }
 917
 918         return NT_STATUS_OK;
 919
 920 }
 921
 922 NTSTATUS crack_dn_to_nt4_name(TALLOC_CTX *mem_ctx,
 923                               const char *dn,
 924                               const char **nt4_domain, const char **nt4_account)
 925 {
 926         WERROR werr;
 927         struct drsuapi_DsNameInfo1 info1;
 928         struct ldb_context *ldb;
 929         char *p;
 930
 931         /* Handle anonymous bind */
 932         if (!dn || !*dn) {
 933                 *nt4_domain = "";
 934                 *nt4_account = "";
 935                 return NT_STATUS_OK;
 936         }
 937
 938         ldb = samdb_connect(mem_ctx, system_session(mem_ctx));
 939         if (ldb == NULL) {
 940                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 941         }
 942
 943         werr = DsCrackNameOneName(ldb, mem_ctx, 0,
 944                                   DRSUAPI_DS_NAME_FORMAT_FQDN_1779,
 945                                   DRSUAPI_DS_NAME_FORMAT_NT4_ACCOUNT,
 946                                   dn,
 947                                   &info1);
 948         if (!W_ERROR_IS_OK(werr)) {
 949                 return werror_to_ntstatus(werr);
 950         }
 951         switch (info1.status) {
 952         case DRSUAPI_DS_NAME_STATUS_OK:
 953                 break;
 954         case DRSUAPI_DS_NAME_STATUS_NOT_FOUND:
 955         case DRSUAPI_DS_NAME_STATUS_DOMAIN_ONLY:
 956         case DRSUAPI_DS_NAME_STATUS_NOT_UNIQUE:
 957                 return NT_STATUS_NO_SUCH_USER;
 958         case DRSUAPI_DS_NAME_STATUS_RESOLVE_ERROR:
 959         default:
 960                 return NT_STATUS_UNSUCCESSFUL;
 961         }
 962
 963         *nt4_domain = talloc_strdup(mem_ctx, info1.result_name);
 964
 965         p = strchr(*nt4_domain, '\\');
 966         if (!p) {
 967                 return NT_STATUS_INVALID_PARAMETER;
 968         }
 969         p[0] = '\0';
 970
 971         if (p[1]) {
 972                 *nt4_account = talloc_strdup(mem_ctx, &p[1]);
 973         }
 974
 975         if (!*nt4_account || !*nt4_domain) {
 976                 return NT_STATUS_NO_MEMORY;
 977         }
 978
 979         return NT_STATUS_OK;
 980
 981 }